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Select first row in each GROUP BY group?
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On Oracle 9.2+ (not 8i+ as originally stated), SQL Server 2005+, PostgreSQL 8.4+, DB2, Firebird 3.0+, Teradata, Sybase, Vertica:
WITH summary AS (
SELECT p.id,
p.customer,
p.total,
ROW_NUMBER() OVER(PARTITION BY p.customer
...
How to change ProgressBar's progress indicator color in Android
...t="wrap_content"
android:indeterminate="false"
android:maxHeight="10dip"
android:minHeight="10dip"
android:progress="50"
android:progressDrawable="@drawable/greenprogress" />
Then create a new drawable with something similar to the following (In this case greenprogress.xml):...
How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONP
... Pedro WerneckPedro Werneck
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How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
...cause it is private.
Edit: construct_finder_sql was removed in Rails 5.1.0.beta1.
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Are HLists nothing more than a convoluted way of writing tuples?
...1 = f1.toList // Inferred type is List[Int]
val t2 = (23, ((true, 2.0, "foo"), "bar"), (13, false))
val f2 = flatten(t2)
val t2b = f2.tupled
// Inferred type of t2b is (Int, Boolean, Double, String, String, Int, Boolean)
Without using HLists (or something equivalent) to abstract over the ar...
How to redirect output of an already running process [duplicate]
...put.
Firstly find the PID of the process:
$ ps aux | grep cat
rjc 6760 0.0 0.0 1580 376 pts/5 S+ 15:31 0:00 cat
Now check the file handles it has open:
$ ls -l /proc/6760/fd
total 3
lrwx—— 1 rjc rjc 64 Feb 27 15:32 0 -> /dev/pts/5
l-wx—— 1 rjc rjc 64 Feb 27 15:32 1 -> /tmp...
How to calculate number of days between two given dates?
If I have two dates (ex. '8/18/2008' and '9/26/2008' ), what is the best way to get the number of days between these two dates?
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What is the difference between linear regression and logistic regression?
...As regression might actually
produce probabilities that could be less than 0, or even bigger than
1, logistic regression was introduced.
Source: http://gerardnico.com/wiki/data_mining/simple_logistic_regression
Outcome
In linear regression, the outcome (dependent variable) is continuous.
It can...
Mismatch Detected for 'RuntimeLibrary'
...oaded and extracted Crypto++ in C:\cryptopp. I used Visual Studio Express 2012 to build all the projects inside (as instructed in readme), and everything was built successfully. Then I made a test project in some other folder and added cryptolib as a dependency. After that, I added the include path ...
Rails update_attributes without save?
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602
I believe what you are looking for is assign_attributes.
It's basically the same as update_att...